Telephone substation set



April 6, 1948. H. F. OBERGFELL TELEPHONE SUBSTATION SET a Sheets-Sheet 1 Filed May 13, 1944 INVENTOR. HERBERT F. OBERGFELL DECEASED AMANDA OBERGFELL, EXECUTRIX ATTQR NE! April 1948. H. F. OBERGFELL 2,439,218

TELEPHONE SUB STATION SET Filed May 13, 1944 SSheet-Sheet 2- FIG.4I as INVENTOR. HERBERT F OBERGFELL,DECEASED AMANDA OBERGFELL, EXECUTRIX &%Z.

TORNEY April 6, 1948. H. F. OBERGFELL TELEPHONE SUBSTATION SET Filed May 1:5, 1944 s Sheets-Sheet s l I I I I ATTORNEY Patented Apr. 6, 1948 12,439,218 TELEPHONE SUBSTAIION SET Herbert F;hergfell ,deceased, late: of. River For est, Ill-.,=by.Amanda 0Iiergfell,..executrix,. River Forest,Ill.,.-a'ssignor to AutomaticiElectric Lab: oi-stories; Inc; Chicago, 111., a corporation of Delaware rApplication. May il3, 1944,.5er-ia1..No..a535,4;03

. This invention relates in .generalto. telephone sub-station sets. and in particular. to telephone sets for use onboard ship. l

The telephone set of this; invention was-.de-

signed .especially for. use eon-ships, -or..in. like;

places, where it issubjectedhto inclement weather,- -severe shock, or concussions. Thisrtelephone set was. also -des-ignedwto .withstand a 2,000 foot pound shock and still. be. in workingorder.

The principal object ofrthe: invention isto. pro-... vide a locked-mounting :device which prevents so that the handset will not b dislodged or re-- moved from its: mounting vin response'to.v shock or concussions. to thereby. .cause false ..operation of. the. switchhook. contaots, .while .at the. same time-the user mayeasily.remove said. handset from its mountings in .the normal .use thereof.

Another feature of the invention .relates .to

I: 2 the transmitter endtor .theehahdsetiwhen the. latmeans for mountingthe face or .apparatus' plate ontothe metal baseof thetelephone handset. This consists of. four members held to'g'etherflby three pins, or rods-forming ahinge-like bracket, one end of which is permanently attached to the metal base. of..the. telephone setand the other end is permanently fastenedtothe face or apparatus plate. 7 [Another .feature "relatesto the means for mounting the remainingapparatus. or the telephone. set so-as to withstand severe" shocks and to make the samesplash proof.

The above featuresjand. others. not specifically mentioned.- are illustrated in .the accompanying drawings .comprisingFigs. I through "7.

. Fig. 1 illustrates the front or the. telephone set with the ha'ndset removed.

Fig. 2 illustrates the. rear. of the front .orap paratus .plate 3 and apOrtionof the metal'case l showing. the hinge like bracket connecting the base I to the .apparatusp'late 3;

.Fig. 3. is asectio-nal View taken along theline FF. of Fig. 2 showing the. hinge like bracket; and the method oiattaching ittothe face or apparatus plate ,3 and metal base. j p Fig. 4. is a sectional view taken alongtheline BB in Fig. 1 with a portion of the handset added shOWing the .p'ositionfiof the loclnngplateand ter is injts normal. position.

' Fig. '5' is asectionalwiew taken alongthe line CCin. Fig. 1 with abortionoithe handsetadded.

showi'ngithe positionoof. the receiver. end. oithe handsetwhen it isfin its normalposition.

. Fig. 6. aperspectiveview. fofflthe. lockingasseinbly.

Fig. 7 is a sectional view of the apparatus plate taken. along thelineAAof Fig. 1 withthe addition. of thehahdsetingits. mountings, in. order to show. .the normal position of. the switchhook .'assembly and .springcontactsathe locking plate, the lock. latch. and. .lock..;.pin: with; the .switchhook springsnandthe. operating member shown in full. The dotted lines indicateoheof the positionsjoi the. handset and. switlchhook assembly during removal or. replacement. of the handset.

Referring tolth drawings, the casing I comprises .ametal base tojwhich is welded a T-shaped member-havingthe metal arms .2 projecting from the sides and bottom for mounting the telephone set. on the .wa1l....Atthe bottom of the casing l are. provided sorewlpl'ug's' 2B, which, upon removal, provide openings for connecting with conduit or cablacontaining telephone line wires. On the insideoi the casing l is provided a terminal block (notshown). .uponwhichthe telephone wires terminat'eior. interconnecting with the telephone apparatusll Insideiofthetop'of the casin I is mount'edthe ringer. movement (not shown). On the outside of the casing .l on the, top are mounted ringer gongi23l An angle. iron 38, jpartly shown in Fig. 3, is welded to the insideof the casing I toform ashelr for mounting the apparatus plate, 3. A rubber gasket-35, Figs. .2 and 3, is cemented to the angle iron3ll to form a water tight enclosure whenthe face plate 3 is fastened by. meansof screws I8 into: thetapped holes in the angle ir.on3fl'of casin l.

'."The fa'c,e; plate 3 comprises a flat metal plate A pair'of retaining members 3| and 3l-are fas- 3 screws 25 and 26 extending through holes in the flanges of 3| and 31 of the retaining members and screwed into the tapped holes in the face plate 3 and re-enforcing metal straps Fig. 2. These retaining members 3| and 31 are in general cup shaped and have an innercontour conforming fairly closely to the outercontour of the receiver and transmitter housings of the hand;

set. The retaining members are positioned near 7 the ends and above the recesses 9 and [.9 in the face plate and extend outwardly therefrom,

thereby forming a partial enclosure-having an 4 wall 4, Fig. 5, into the hollow space in base This end of the shaft 8 is flattened and to this flattened surface the angular member 54 is secured by means of screws 61. A hole 55 is provided in one arm of member 54 for anchoring one end of spring 64. An insulating bushing 56 is provided on the other 'arm of member 54 for contacting and operating the switchhook spring contacts.

A switchhook spring contact assembly comprises the usual stationary springs 59 and the actuating spring contacts 51. A heavy spring 58 is also provided in the spring assembly to noring ribs 35, at the points where the receiver a housing 42 and the transmitter housing 43 of the handset 4| normally engage their respective retaining members. This is fully shown in Figs. 4 and 5 where it will beseen that the inner contour of the retaining members at.lines 33 and 34 conform to the outsidecontour of the handset housing. These re-enforcing ribs have been placed at' this location to prevent bending or breaking of the retaining means at a time when the telephone set is subjected to heavy shock or concussion. I

The recesses 9 and I9 extend inwardly from the face plate 3 and thecup shaped retaining members 3| and 3'! provide a partial enclosure which is large enough to easily accommodate the handset and permit both longitudinal and radial movements of the handset into the deeperreoess 9 even though the restricted opening between the retaining members is less than the overall length of the handset. The recess 9 is deeper than the recess Hi to permit both longitudinal and radial movement of the handset within the enclosure and to provide space for the switchhook plate 65 which controls the operation of the switchhook spring contact. assembly, depending upon whether the handset is in its mounting enclosure or removed therefrom.

A stop member comprising the rod 24 extends transversely across the recess 9 to guide the handset and to prevent the inward movement of the receiver housing 42 of the handset until the same has been longitudinally moved into the recess 9 far enough to allow the receiverihousing 42 to clear the stop member 24. The stop member 24 is secured to the side wall 4 by means of screws l1, Fig. 5. .4

A switchhook assembly shown in Figs. Z'and 7 is mounted on a shaft-8 extending. transversely through the recess 9.

One end of the shaft 8 extends through a bushing 21 in the side wall 4 and is rotatably mounted therein by means of washer H and screw l0, Figs. 2 and 5, screwed into the shaft 3. The center portion of the shaft 8, located within the recess 9, has been notched to permit the switchhook plate BB to be secured thereto by means of screws 82, Fig. 1. The plate 66 is curved slightly at its outer edges as shown in Fig. 5. An extension 52 on plate 66 is provided to limit the movement of plate 66 by spring 64 when the handset is removed from its mounting as shown in Fig. '7 where it is seen that this limiting extension 52 may engage the curved portionfi to limit further counterclockwise rotation of .the shaft 8 and incidentally further operation of the switchhook switching contacts. Theouter end ofv the shaft 8 extends through a bushing 21 in the side mally maintain one stationary spring 51 engaged with one'of the-spring contacts 59, whenthe contact springs are in normal position as shown in Fig. '7. This heavy spring 58 also prevents vibration of springs 51 when subjected to extreme shocks or concussion. Contact spring assembly also comprises the usual metal plate 6|, insulators 60 separating the adjacent springs. the metal block 62 and screws 53, shown iri Fig. 7 An angle the face plate 3 by means of screws 22"extending' through the face plate 3. The two sideplates 8| are shaped to fit over the Bakelite ends of the induction coil 80 andfirmly holdthe induction coil, while the end'members I9 fit over cut away portion of the Bakelite ends of the induction coil as shown in Fig. 2.

An insulated terminal block 11 having termi nals l8 for the connectionsbetween face plate 3 and base I, is secured to the underneath side of depression 5 as shown in Fig. 2. This terminal block is also used to fasten one end of the handset cord (not shown) e When-the handset 4| is in its mounting the spring actuated plate 66 presses against the receiver end and holds the upper end of the handset against the retaining member 3| as shown in Figs. 5 and 7, and also holds the lower end of the handset against the retaining member 31.

In the recess l9 there is a lock plate. to, Figs. 4 and 7, together with its lock latch 5|, rotatably mounted on a lock plate shaft 53. In the; recess Hi there is also mounted a lock plate spring 40 which tends to move plate 50 to the dotted position of Fig. 7, and a lock guide 41 which controls the direction of the movement of thelock pin 48. The lock plate shaft 53.an;d lock pin 48 are mounted transversely across the recess IS. The lock pin 48 moves to the left, Fig. .6, and its left end passes back of the. lock latch 5| under control of the trip lever spring 49, when the trans-- mitter end of the handset is pressed down against the projecting portion 68,'of the lock plate 55, which isperpendicular to the top face .of lock plate 50. The spring'49 has one end securedito trip lever 45 and the other end to the wall'of depression 5. The end of thelock pin 48 moves out from behind the lock latch 5| when thelock pin 48 moves to the right under control of. the lock lever 44-, Fig. 6. The lock lever. 44 shown in Figs. 1 and 6 may be moved to the left manually,

the. movementto the. rightatbein'g controlled. by i the trip .leverispringadan The face. .plate 3 is' normally.held:-in;placeon the metal. base. .by sixteen .-.screws,v such as. .l 8, there being a .rubber...gasket. between.. face..p1ate 8 and the .baseJ.

When the screws are removed; the-.weight; of

the face, plate, .together) with; the. equipment rotated to the right and. .finally. come ,to. rest on the right. of..the .metalobase .as..shown. in. Figs. 2 and 3. Thus.theapparatusonthe underneath.

side. of the. face.plate easuwellxasithe. apparatus within the base, is exposed for/ inspection. The hinge like bracket shown .in-.Figs..2 ,and.3 comprisesfour. members, |2,xtl 3, l igand 15. and. three pins it... Member .1 his fastened. .to the face plate Bby twoscrewsfil: Member i5. is fastened to .thebase plate. I. byutwo .screws TI 1; The guide bracket l 3 prevents the .iaceplate. from swings. ing. into any position .which. .could cause darnage. to any equipment. or wiring.,

When the handest-isiin itsmounting thetransmitter end of the handset is-prevented. from being moved away. from-.theuinside surface of the retaining. member t'lbythelock plate 5.0, through the combination ofathe. lock tplate lock latch, lock guide and lockhpinw. Dueto the. retaining members SI. and 3'i.,.=.-the locktplate .Eiiand lock pin it, the handsetis retainedwithin the enclosure iormed bytheretaining. members and recesses 9 and ldzfwhen the: telephone is subjected to severe shocks or concussions,..such as exploding bombs-or the firing. of large guns.

In .order'to remove the handset. from its on closure it is-first necessary to move the top of the lock lever 44 totheleft' in the direction of the arrow D (Fig. 6). This .withdrawsin the direction of the. arrowE, .the lock pin. 48. from its normal position. back of lock latch 51, as seen in dotted lines in Fig. .1. This operation moves the lock pin 48.1fm the righteinithe direction of the arrow E, asseen. in Figure 1-6, and, as the lock pin guideblockA'Lis fixed, thezleftend of lock pin d8, as seen in Figure. 6, willdisappear ithin the lock pin guide blockAlerrIt will be noted, in Fig ure .4, that the endotthe lock. pin ifl which is at the-left in Figure 6, is shown/at the right in Ffigure 4 and .thereforewhen the "lock lever i l. is movedto the left .as describedabov e,-;thelock pin. 58 moves to the left as seenin Figure 4 and its end, (that is the rightendseen in E e 4) moves to the left;from,its normal positionbelow thelock latch =5 I,, to a, second; position, that is the unlocked position. Thgrtwo positions of the lock latch 5| can beseenin :Figurefl, wherein the normal or locked position is shown in full lines and the second or unlocked position is shown in dotted -lines. The second position of lock latch 5| is accomplished by pressure from spring it after the end of lock pin 48 disappears within the lock pin guide blookfll as described above, and the handset has been removed from the mounting. After the above described-operations, the handset is moved longitudinally. upwards. The longitudinal movement .is accompanied by pressure on the receiver end of the handset to force thereceiver housing further back into recess 9 This -movement--is continued until the transmitter endof l the handset. is free from the retaining member-31 and canbe zdrawn forward, followed by a longitudinal movement downward until -the .receiverend of .the;-: handset .is com pletely. withdrawn. from.- the iretainingememberr 3 i; The handsetis nowreadnforluse...

The .locking .deviceisshowntingFigsrfi andfl and is composed Of.;thl;kpl9.t.; 50; .the lock latch is i attached. to; the -.reari1.of ;the...locle plate; a lock guide 41, 'a lock pin.48l;withda spacer '16,. a trip lever it. witha trip/leverspring...!i9a1and 1 trip lever spring. hook .bracketinot. shown) .sei-i cured to the wall of...depr e ssion 5, ea lockilever shaft 46 and a lock lever:44. Whenlthehandset. is not in usethe. lock lever Mionthehoutside. of. the face plate 3,:is;in;.the.;norma1;.:position.as. shown in Fig. l and .canube-rotatedto thezleft ap,-.

proximately 15 degrees, ;such,movement com-1 municated through the .trip.'lever-,+l5, underneath the front plate, to the .lock1pinw48 moying thezlock pin to the right (in-.the .directioncof thecarrow E, Fig. 6) farenoughato release theilocklatch; 5! .on the back of the lock. plate ;(shown gin..dot.. The lock ;plate:;- 5E). .will :1 be pressed backwardunder tension of the lockplate ted lines, .Fig. 1).

spring 49 when thehandset is moved longitudie nally upwards and the handset .whichpreviouslyq had been located within the. retainingumembers 3i 1 and ill can now .beremovedm,Thenpressure' on the lock lever Mscambe.maintainedlbie one. finger or the thumb of the hand which grasps'the handset to initiate longitudinal.rmovemcnt,

thereby the entire operation dSGribed1fibQVe=G&Il"

be made with one hand.

In order to replacethe handsetginitscmounting the reverse order of .movementsewiththerein- .ception of the manipulation of-:.the::.:lock:lever,

as above set forth, are requireddue tortheopening this forward movement the transmitter housing meets the locking plate;

longitudinally downwards: causing the transmitter housing to press against theupturned end $3 of the lock plate 50; causing it to rotateon its axis This movement causes thelockplate with its lock latch 5|.to be.lifted-forw.ard-far enough for the lock pin winder: pressure, of the trip spring 69 tomove to :thealeft-r as seen in Fig. 6 until the end of the lock pin passes'back of the lock latch E! to the position showngin Fig. 4,

thus securely locking the, handsetwithin therretaining members. Hand pressurezshouldbe main-- tained on the handset until the final-downward,

movement is completed, which will- 12e, indicated by a movement of the locklever 44 from its-vertical position, to a position about-i5 sdegreestto the right to its normal posi-tiong y From the foregoingdescriptionit willtbeseen that the locking arrangementmust be tripped.

and certain prescribed movements of thehandset are necessary before the same can be removed from the restricted opening in its mounting and therefore a telephone hasbeen prpvided with a shock proof mounting and lockingdevice to maintain the handset .in its 'mounting-andto prevent false operationof the switchhookspring contacts due to shocks or concussions What is claimed is:-

Atgthe' end. of this forward movement thehandsetzis finally moved Ina tel ph n s rmou tinstmeansin luw:

ing a recess and two retaining members requ'irto cause said lock pin to release said latch and lock plate allowing said handset to be moved in.

said upward longitudinal, then outward and downward longitudinal movements.

2. A locking mounting for a telephone handset including a face plate having recessed portions extending inwardly for receiving the transmitter and receiver portions of said telephone handset, two retaining members secured to said face plate for forming a partial enclosure of said recessed portions, said retaining members extending out; wardly from said face plate and having inner contours conforming substantially to the rear outer contours of the handset portions housing the receiver and transmitter of the handset, a spring actuated member within the receiver portion of said recess, a plate within said transmitter portion of said recessed portion, and means for locking said plate against movement for holding said handset in engagment with said retaining members.

3. A locking mounting for a telephone handset including a base, recessed portions extending within said base for receiving the receiver and transmitter portions of the handset, a lock plate pivotally mounted in one of said recessed portions of said base, a lock latch associated with said plate, a lock member located partly within said one recessed portion, a spring for actuating said member, a lock lever, means including said member under tension of said spring necessitating movement of said lock lever before said handset can be removed from said portions.

4. A locking mounting for a telephone handset including a base, a recessed portion extending within said base for both the receiver and transmitter portions of the handset, a shaft pivoted in said recessed portion of said base, a lock plate attached to said shaft and having an upturned end, a manually operated lock lever controlling said plate, a lock plate spring with one end attached to the recessed portion of the face plate and the other end tensioned against the upturned end of the lock plate for retaining the look plate in position to receive the transmitter end of the handset without manual movement of the lock lever.

5. A locking mounting for a telephone handset including a base, a recessed portion extending within said base for receiving both the receiver and transmitter portions of the handset, a shaft pivoted in said recessed portion of said base, a lock plat-e attached to said shaft, a lock plate spring with one end attached to the recessed portion and the other end tensioned against the lock plate for retaining the lock plate in position to receive the transmitter end of the handset, and

' a lock latch associated with the said lock plate for holding the lock plate in another position when the handset is in its mounting.

6. A locking mounting for atel'ephone handset including a base, a recessed portionextending Within said base for receiving both the receiver and transmitter portions of the handset, a shaft pivoted in said recessed portion ofsaid base, a lock plate attached to said shaft and having an upturned end, a manually operated lock lever, a lock plate spring with one'end attached to the recessed portion of the face plate, and the other end tensioned against the upturned end of said lock plate, a lock latch associated with the said lock plate, a lock pin within said recessed portion, a trip lever spring for causing said pin to maintain the lock plate and the lock latch in a position to prevent the handset from being removed from its mounting without manual move ment of the lock lever, causing movement of said pin against the tension of said spring to permit movement of said lock plate. 7. A locking mounting for a telephone handset including a base, a recessed portion extending within said base for receiving the receiver and transmitter portions of the handset, a shaft.

pivoted in said recessed portion of said base, a lock plate attached to said shaft and engaged by one portion of the handset when placed in its mounting, a lock plate spring with one end attached to the depressed portion of the face plate and the other end tensioned against the lock plate, a lock latch associated with said lock plate, a lock pinpartially'within said recessed portion, a manually operated lock lever, a trip lever member and a spring attached at one end to the trip member and at the other end to the face plate to maintain the lock pin in position, thereby necessitating a manual movement of the lock lever before the handset can be removed from its mounting.

8. In a locking mounting for a telephone handset, a shock proof mounting means including a reoess'and a locking retaining plate in' said recess for preventing dislodgement or removal of said handset from its mounting in said recess in response to shock or concussion, a lock lever, a lock pin, a lock latch attached to said retaining plate, movement of said lock lever moving said lock pin from engagement with said lock latch to cause retaining plate to release said handset and then permit longitudinal movement of said handset receiver into said recess and then outward movement of said handset before said handset can be removed from said locking mounting.

9. In a telephone set, a mounting and locking means for a handset including a recess, a set of AML'ANDA OBERGFELL,

Emecutrizc of thc Estate of Herbert F. Obergfell,

, deceased.

REFERENCES CITED The following references "are of record in the file of this patent:

V UNITED STATES PATENTS Number Name Date 2,222,114 Morton Nov. 19, 1940 2,348,592 Beardsley May 9, 1944 2,351,125 Henrickson June 13, 1944 2,355,464 Obergfell Aug. 8,1944 2,375,681

Obergfell May 8, 19 45 

